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一、物质提纯与分离的一般方法1．过滤法用于液体与不溶性固体混合物或可溶性固体与不溶性固体混合物的分离。如除去水中的泥沙；分离实验室制取氧气后固体混合物中的MnO，和KC等。2结晶法用于溶解度受温度影响差异较大的几种可溶性固体的分离。如NaCI和KNO。的分离等。3．溶解
First, the general method of material purification and separation Filtration is used for the separation of a liquid from an insoluble solid mixture or a mixture of a soluble solid and an insoluble solid. Such as the removal of sediment in water; separation of oxygen in the laboratory after the preparation of oxygen in the solid mixture of MnO, and KC and so on. 2 Crystallization is used for the separation of several soluble solids whose solubility is greatly affected by temperature. Such as NaCI and KNO. The separation and so on. 3. Dissolving